private boolean canSmelt() {
if (contents[0] == null) {
return false;
} else {
ItemStack stack = FurnaceRecipes.smelting().getSmeltingResult(contents[0]);
if (stack == null) return false;
if (contents[2] == null) return true;
if (!contents[2].isItemEqual(stack)) return false;
int result = contents[2].stackSize + stack.stackSize;
return result <= getInventoryStackLimit() && result <= contents[2].getMaxStackSize();
}
}
public void smeltItem() {
if (canSmelt()) {
ItemStack stack = FurnaceRecipes.smelting().getSmeltingResult(contents[0]);
if (contents[2] == null) {
contents[2] = stack.copy();
} else if (contents[2].getItem() == stack.getItem()) {
contents[2].stackSize += stack.stackSize;
}
contents[0].stackSize--;
if (contents[0].stackSize <= 0) {
contents[0] = null;
}
}
}